... Proceedings of the 5th Conference on Language Resources and Evaluation (LREC’06), pages 417–422, 2006 Quang-Thuy Ha, Tien-Thanh Vu, Huyen-Trang Pham, and Cong-To Luu An upgrading featurebased opinion ... York, NY, USA, 2004 ACM ISBN 1-58113-888-1 Pham Huyen-Trang, Vu Tien-Thanh, Tran Mai-Vu, and Ha Quang-Thuy A solution for grouping vietnamese synonym feature words in product reviews In Proceedings ... Syst., 21:315–346, October 2003 ISSN 1046-8188 Tien-Thanh Vu, Huyen-Trang Pham, Cong-To Luu, and Quang-Thuy Ha A feature-based opinion mining model on product reviews in vietnamese In Radoslaw...